suta sorry if you have found the solution, but maybe it could be useful for many others. The things you need to do are, take the mentor analog lib, do a cdfdump of the llibrary for which you need eldo netlisting support. then also do a cdfdump for the mentor analoglib. then copy the siminfo section for each of the devices(nmos,pmos,all other standard device components into the cadence analoglib). then load this cdf, thats it you are done. but even after this you need to have models which support eldo. these companies are crazy, they never support interoperability.
amarnath